fix: add missing dependencies

Dockerfile

@@ -34,10 +34,10 @@ RUN apk add --update --no-cache --virtual .build-deps build-base libffi-dev musl
     MOLECULE_MAJOR="${MOLECULE_VERSION%%.*}" && \
     if [ -z "${MOLECULE_MAJOR//[0-9]}" ] && [ -n "$MOLECULE_MAJOR" ]; then \
         echo "Installing molecule version '$MOLECULE_VERSION' ..." && \
-        pip install -qq --no-cache-dir molecule[docker,test]=="$MOLECULE_VERSION"; \
+        pip install -qq --no-cache-dir molecule=="$MOLECULE_VERSION" molecule-plugins[docker]; \
     else \
         echo "Installing latest molecule ..." && \
-        pip install -qq --no-cache-dir molecule[docker,test]; \
+        pip install -qq --no-cache-dir molecule molecule-plugins[docker]; \
     fi && \
     apk del .build-deps && \
     rm -rf /var/cache/apk/* && \

overlay/root/requirements.txt

@@ -9,3 +9,5 @@ hcloud
 pycrypto
 flaky
 passlib
+pytest
+pytest-testinfra